1. Any corroding substance used in etching.
2. Any substance, as alum or copperas, which, having a twofold... Read More
The World Without Us
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1. A soft composition, as of flour moistened with water or milk, or of earth moistened to the consistence of dough, as... Read More
A group of rod-shaped bacteria that are positive to Gram's method and form... Read More
A staining method performed to determine whether a bacterial species is gram-positive (i.e. violet stain) or... Read More